script lang=tsexport default name App setup let name = LHD let age = 19 function speak alert你好鸭！ return name age speak scripttemplate name

<script lang="ts">
import { ref } from 'vue';

export default {
  name: 'App',
  setup() {
    const name = ref('LHD');
    const age = ref(19);

    function speak() {
      alert('你好鸭！');
    }

    return {
      name,
      age,
      speak
    };
  }
};
</script>
<template>
  {{ name }}
</template>